Question

List<User> getUser(){};报错

public static List<User> getUsers() {
List<User> users = new ArrayList<User>();
Connection conn = DataBase.GetConn();
String sql = "select * from user";
Statement stmt = DataBase.getStatement(conn);
ResultSet rs = DataBase.getResultSet(stmt, sql);
try {
while (rs.next()) {
User u = new User();
u.SetId(rs.getInt("id"));
u.SetUserName(rs.getString("username"));
u.SetPassword(rs.getString("password"));
u.SetPhone(rs.getString("phone"));
u.SetAddr(rs.getString("addr"));
u.SetRegDate(rs.getDate("rdate"));
users.add(u);
}

Answer 1

没有导入集合所在的java包
你点击第一个错误位置的“x”就会提示你错误在哪里，为什么错误

import java.util.*;

Answer 2

导入包java.util.*;